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Fuzzy orbit* continuous mappings
R. Malathi,M. K. Uma 원광대학교 기초자연과학연구소 2017 ANNALS OF FUZZY MATHEMATICS AND INFORMATICS Vol.13 No.4
The purpose of this paper is to introduce the concepts of fuzzy orbit open set, fuzzy orbit continuous, almost*-fuzzy orbit continuous, weakly*-fuzzy orbit continuous, fuzzy orbit* continuous with some interesting properties.
Lipid Peroxidation and Antioxidant Vitamin Status in Oral Cavity and Oropharyngeal Cancer Patients
Marakala, Vijaya,Malathi, M.,Shivashankara, A.R. Asian Pacific Journal of Cancer Prevention 2012 Asian Pacific journal of cancer prevention Vol.13 No.11
Background: This study was conducted to determine levels of lipid peroxidation and antioxidant vitamin status in patients with oral cavity and oropharyngeal cancer. Methods: The study group consisted of a total number of 80 subjects between the age 40-68 years, 40 with clinically and histopathologically proved cases of oral cavity and oropharyngeal cancer and 40 normal healthy, age and sex matched volunteers as controls. Levels of lipid peroxidation products as malondialdehyde (MDA) and antioxidant vitamins as vitamin A and vitamin C were estimated and compared between the two groups. Results: There was a statistical significant difference in the mean MDA, plasma vitamin A and vitamin C in the oral and oropharyngeal cancer patients compared with the healthy controls (p<0.0001). Conclusions: Lipid peroxidation (MDA) is higher and plasma antioxidant vitamins like vitamin A and vitamin C were lower in oral cavity and oropharyngeal cancer patients than healthy controls.
( Vijayakumar M. Malathi ),( Ravi P. More ),( Rangasamy Anandham ),( Gandhi R. Gracy ),( Muthugounder Mohan ),( Thiruvengadam Venkatesan ),( Sandipan Samaddar ),( Sushil K. Jalali ),( Tongmin Sa ) 한국미생물생명공학회(구 한국산업미생물학회) 2018 Journal of microbiology and biotechnology Vol.28 No.6
Knowledge about the gut bacterial communities associated with insects is essential to understand their roles in the physiology of the host. In the present study, the gut bacterial communities of a laboratory-reared insecticide-susceptible (IS), and a field-collected insecticide-resistant (IR) population of a major rice pest, the brown planthopper Nilaparvata lugens, were evaluated. The deep-sequencing analysis of the V3 hypervariable region of the 16S rRNA gene was performed using Illumina and the sequence data were processed using QIIME. The toxicological bioassays showed that compared with the IS population, IR population exhibited 7.9-, 6.7-, 14.8-, and 18.7-fold resistance to acephate, imidacloprid, thiamethoxam, and buprofezin, respectively. The analysis of the alpha diversity indicated a higher bacterial diversity and richness associated with the IR population. The dominant phylum in the IS population was Proteobacteria (99.86%), whereas the IR population consisted of Firmicutes (46.06%), followed by Bacteroidetes (30.8%) and Proteobacteria (15.49%). Morganella, Weissella, and Enterococcus were among the genera shared between the two populations and might form the core bacteria associated with N. lugens. The taxonomic-tophenotypic mapping revealed the presence of ammonia oxidizers, nitrogen fixers, sulfur oxidizers and reducers, xylan degraders, and aromatic hydrocarbon degraders in the metagenome of N. lugens. Interestingly, the IR population was found to be enriched with bacteria involved in detoxification functions. The results obtained in this study provide a basis for future studies elucidating the roles of the gut bacteria in the insecticide resistance-associated symbiotic relationship and on the design of novel strategies for the management of N. lugens.
S. Prabhakaran,R. Malathy,M. Kasiviswanathan 국제구조공학회 2024 Structural Engineering and Mechanics, An Int'l Jou Vol.90 No.2
Cold-formed steel (CFS) I sections are increasingly being used as load-bearing components in building constructions, and such I sections frequently incorporate web holes to facilitate service installation. The economical and structural advantages of these elements have prompted many researchers to investigate the behavior of such structures. Despite numerous studies on the buckling stability of castellated beams, there is a notable absence of experimental investigation into oval castellated beams with stiffeners. This study examines the local buckling of cold-formed steel castellated I-beams stiffened with oval constellations through experimental and numerical analysis. Four specimens are fabricated with and without stiffeners, including parallel, perpendicular, and intersecting types attached to the web portion of the beam, along with cross stiffeners for the oval-shaped openings at the beam ends. Additionally, a numerical model is developed to predict the behavior of castellated beams with oval openings up to failure, considering both material and geometric nonlinearities. Codal analysis is performed using the North American specification for cold-formed steel AISI S-100 and the Australian/New Zealand design code AS/NZS 4600. The anticipated outcomes from numerical analysis, experimental research, and codal analysis are compared and presented. It will be more helpful to the preliminary designers.
L.S. Praveen,Govind R. Kadambi,S. Malathi,Preetham Shankpal Techno-Press 2023 Ocean systems engineering Vol.13 No.2
This paper proposes a method for the acoustic imaging wherein the traditional requirement of the relative movement between the transmitter and target is overcome. This is facilitated through the beamforming acoustic array in the transmitter, in which the target is illuminated by the array at various azimuth and elevation angles without the physical movement of the acoustic array. The concept of beam steering of the acoustic array facilitates the formation of the beam at desired angular positions of azimuth and elevation angles. This paper substantiates that the combination of illumination of the target from different azimuth and elevation angles with respect to the transmitter (through the beam steering of beam forming acoustic array) and the beam steering at multiple frequencies (through SF) results in enhanced reconstruction of images of the target in the underwater scenario. This paper also demonstrates the possibility of reconstruction of the image of a target in underwater without invoking the traditional algorithms of Digital Image Processing (DIP). This paper comprehensively and succinctly presents all the empirical formulae required for modelling the acoustic medium and the target to facilitate the reader with a comprehensive summary document incorporating the various parameters of multi-disciplinary nature.
A. Chithambar Ganesh,M. Muthukannan,R. Malathy,C. Ramesh Babu 대한토목학회 2019 KSCE JOURNAL OF CIVIL ENGINEERING Vol.23 No.10
This paper presents the experimental results of self-healing efficiency of two different bacteria namely Bacillus sphaericus and Bacillus subtilis incorporated in with polypropylene fibre reinforced concrete. Concrete was prepared with an optimum amount of polypropylene fibre and cultured bacteria. The artificial cracks were formed in the concrete to perform this investigation. The cracked concrete was observed at constant intervals. The effectiveness of self-healing was evaluated by the mechanical test over the bacterial concrete with fibre (BCF). The results obtained from the mechanical study show that the BCF produced commendable results. The precipitation characteristic analysis was carried out by SEM and XRD diffractogram analysis was performed to confirm the precipitation in BCF. The analysis shows that there is a presence of sufficient self-healing compound in cracked concrete. The effectiveness of the developed BCF concrete in regaining strength shows a substantial increase in strength after self-healing therefore, the effectiveness of self-healing of BCF is admirable.
M.N.A. GulshanTaj,Anupam Chakrabarti,R. Malathy,S.R.R. Senthil Kumar 국제구조공학회 2021 Structural Engineering and Mechanics, An Int'l Jou Vol.80 No.3
Owing to the increase in demand for composite materials for different applications in aircraft structures, the nonlinear response of functionally graded ceramic-metal sandwich plates under mechanical loading is studied in the present research work. Geometric nonlinearity (GNL) is considered by Green-strain components and further assumes the form of von Kármán strains. It is ascertained that the effective mechanical properties vary through the thickness direction as a function of volume fraction of ceramic and metal constituents and obeys power law equation. Higher order displacement model proposed by Reddy is incorporated in the study to arrive for 2D isoparametric finite element C0 formulation. A nine node Lagrangian element is accomplished to model the assumed plate geometry. Different thickness schemes are proposed to model the sandwich plate with graded layer as core/ face sheets. Although the model can handle thickness scheme of any kind, results are exposed for four types of symmetric sandwich plates. Comparison statement between isotropic and graded plates is drawn in each case by appropriate selection of power law exponent value. The present investigation may be useful for design engineers/researchers to arrive for particular thickness scheme based on the results, while performing large deformation analysis of functionally graded sandwich plates (FGSP).